Making bright giants invisible at the Galactic Centre
文献类型：期刊论文
| 作者 | Amaro-Seoane, Pau1,6,7,8,9; Chen, Xian4,5; Schodel, Rainer3; Casanellas, Jordi2 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2020-02-01 |
| 卷号 | 492期号:1页码:250-255 |
| ISSN号 | 0035-8711 |
| 关键词 | stars: atmospheres Hertzsprung-Russell and colour-magnitude diagrams stars: horizontal branch white dwarfs galaxies: nuclei |
| DOI | 10.1093/mnras/stz3507 |
| 英文摘要 | Current observations of the Galactic Centre (GC) seem to display a core-like distribution of bright stars from similar to 5 arcsec inwards. On the other hand, we observe young, massive stars at the GC, with roughly 20-50 per cent of them in a disc, mostly in the region where the bright giants appear to be lacking. In a previous publication we put the idea forward that the missing stars are deeply connected to the presence of this disc. The progenitor of the stellar disc is very likely to have been a gaseous disc that at some point fragmented and triggered star formation. This caused the appearance of overdensity regions in the disc that had high enough densities to ensure stripping large giants of their atmospheres and thus rendering them very faint. In this paper, we use a stellar evolution code to derive the properties that a red giant would display in a colour-magnitude diagram, as well as a non-linearity factor required for a correct estimate of the mass loss. We find that in a very short time-scale, the red giants leave their standard evolutionary track. The non-linearity factor has values that not only depend on the properties of the clumps, but also on the physical conditions of the giant stars, as we predicted analytically. According to our results, envelope stripping works, moving stars on a short time-scale from the giant branch to the white dwarf stage, thus rendering them invisible to observations. |
| 资助项目 | Ramon y Cajal Programme of the Ministry of Economy, Industry and Competitiveness of Spain ; COST Action[GWverse CA16104] ; National Key R&D Program of China[2016YFA0400702] ; National Science Foundation of China[11721303] ; National Science Foundation of China[11873022] ; European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC[614922] ; State Agency for Research of the Spanish MCIU through the 'Center of Excellence Severo Ochoa' award[SEV-2017-0709] ; MCIU/AEI/FEDER, UE[PGC2018-095049-B-C21] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000512329900018 |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/50819]  |
| 专题 | 中国科学院数学与系统科学研究院 |
| 通讯作者 | Amaro-Seoane, Pau; Chen, Xian |
| 作者单位 | 1.CSIC, Inst Space Sci ICE, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain 2.Dataguda, Septimania 41, Barcelona 08006, Spain 3.Inst Astrofis Analucia, Glorieta Astron S-N, E-18008 Granada, Spain 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Peking Univ, Sch Phys, Astron Dept, Beijing 100871, Peoples R China 6.TU Berlin, Zentrum Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany 7.Chinese Acad Sci, Acad Math & Syst Sci, Inst Appl Math, Beijing 100190, Peoples R China 8.Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 9.IEEC, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain |
| 推荐引用方式 GB/T 7714 | Amaro-Seoane, Pau,Chen, Xian,Schodel, Rainer,et al. Making bright giants invisible at the Galactic Centre[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(1):250-255. |
| APA | Amaro-Seoane, Pau,Chen, Xian,Schodel, Rainer,&Casanellas, Jordi.(2020).Making bright giants invisible at the Galactic Centre.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(1),250-255. |
| MLA | Amaro-Seoane, Pau,et al."Making bright giants invisible at the Galactic Centre".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.1(2020):250-255. |
入库方式： OAI收割
来源：数学与系统科学研究院
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